BQ29312A Datasheet, PDF (5/35 Pages) Texas Instruments – TWO-CELL, THREE-CELL, AND FOUR-CELL LITHIUM-ION OR LITHIUM-POLYMER BATTERY PROTECTION AFE

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bq29312A
SLUS629A – JANUARY 2005 – REVISED AUGUST 2005
ELECTRICAL CHARACTERISTICS (Continued)
T_A = 25°C, C_(REG) = 4.7 µF, BAT = 14 V (unless otherwise noted)
PARAMETER
TEST CONDITION
OVERLOAD (OL) AND SHORT-CIRCUIT (SC) DETECTION
V_OL
∆V_OL
V_HYS(OL)
OL detection threshold range, typical⁽¹⁾
OL detection threshold program step
OL detection threshold hysteresis
V_(SC)
SC detection threshold range, typical⁽²⁾
Charge
Discharge
∆V_(SC) SC detection threshold program step
Charge
Discharge
V_HYS(SC) SC detection threshold hysteresis
V_{(OL_acr)} OL detection threshold accuracy⁽¹⁾
Charge and Discharge
Discharge
V_{(SC_acr)} SC detection threshold accuracy⁽²⁾
FET DRIVE CIRCUIT
Charge and Discharge
V_OL = 50 mV (min)
V_OL = 100 mV
V_OL = 205 mV (max)
V_SC = 100 mV (min)
V_SC = 200 mV
V_SC = 475 mV (max)
V_(FETON)
Output voltage, charge, and discharge
FETs on
V_(ZCHG) ZVCHG clamp voltage
V_(FETOFF)
Output voltage, charge and discharge
FETs off
t_r
Rise time
t_f
Fall time
THERMISTOR DRIVE
V_(FETOND)= V_(BAT)– V_(DSG)VGS connect 1 MΩ
V_(FETONC)=V_(PACK)– V_(CHG)VGS connect 1 MΩ
BAT= 20 V
PACK = 20 V
PACK= 4.5 V
V_(FETOFF)= V_(PACK)– V_(DSG)
V_(FETOFF)=V_(BAT)– V_(CHG)
C_L = 4700 pF
C_L = 4700 pF
PACK= 16 V
BAT = 16 V
V_DSG :10%–90%
V_CHG :10%–90%
V_DSG :90%–10%
V_CHG :90%–10%
r_DS(on)
LOGIC
TOUT pass-element series resistance
I_O = –1 mA at TOUT pin, rds_(ON) = (V_REG– V_O (TOUT))/1 mA,
T_A = –25°C to 85°C
R_(PUP) Internal pullup resistance
V_OL
Logic level output voltage
XALERT
SDATA, SCLK,
XALERT, I_O = 200 µA,
SDATA, I_O = 50 µA,
OD I_O=1 mA,
T_A = –25°C to 85°C
T_A = –25°C to 85°C
T_A = –25°C to 85°C
T_A = –25°C to 85°C
T_A = –25°C to 85°C
MIN
–50
7
100
–100
40
40
90
184
80
180
426
12
12
3.3
60
6
(1) See OL register for setting detection threshold
(2) See SC register for setting detection threshold
NOM MAX UNIT
–205 mV
5
mV
10 13 mV
475
mV
–475
25
mV
–25
50 60 mV
50 60
100 110 mV
205 226
100 120
200 220 mV
475 523
15 18
V
15 18
3.5 3.7
V
0.2
V
0.2
40 200
µs
40 200
40 200
µs
40 200
50 100
Ω
100 200
kΩ
10 20
0.2
0.4
V
0.6
5